Answers

2015-08-12T23:54:16+08:00
The smoke coming from the cars
the smoke from the cigarette
when you burn a plastic ,it pollutes our air
0
2015-08-13T06:04:02+08:00
Greenhouse gases. I know you can name those. But if you don't have an idea about greenhouse gases, research... We often pollute air through these gases.

cheers
-iDaniel2000
0